Pumps – Condition responsive control of pump drive motor – Plural pumps having separate drive motors – supply sources,...
Patent
1991-09-06
1993-03-02
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
Plural pumps having separate drive motors, supply sources,...
417 12, 417 19, 417 20, 417 38, 417 43, F04B 4106
Patent
active
051904420
ABSTRACT:
A sewage pumping system includes a container, an inlet for the inflow of liquid and a modality for ascertaining the liquid level in the container. Two or more pumps are provided, each having an inlet communicating with a container and an outlet communicating with the common conduit. A pump controller receives information from the modality for ascertaining the liquid level and is adapted to start and stop individual pumps. A pressure sensing device is located in the conduit for sensing the backpressure against which pumps in operation are pumping, and for generating a second signal corresponding to the sensed backpressure, the signal going to the pump controller. An addressable memory is operatively connected with the pump controller and stores values corresponding to pumping rates vs. backpressure for each of the pumps, along with high and low backpressure values for each pump. On high backpressure the pump controller avoids pumpstarts which will not result in a net increase in the total pumping rate. On, on a decrease in backpressure, the pump controller allows more pumps to start when called for, and allows for the starting of more pumps than the minimum necessary, in order to decrease the duration of pumping. Controller avoids pumpstarts under conditions which, given the stored high and low backpressure values for the respective pump, would result in the pump undergoing rapid on/off cycling. Finally, the pump controller avoids starting and stopping pumps on pressure surges by delaying any action for a given time period which is longer than the duration of a typical pressure surge.
REFERENCES:
patent: 2246940 (1941-06-01), Hood
patent: 3247864 (1966-04-01), Conery
patent: 4341983 (1982-07-01), Gottliebson
patent: 4705456 (1987-11-01), Gardeen
Bertsch Richard A.
Scheuermann David W.
LandOfFree
Electronic pumpcontrol system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electronic pumpcontrol system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic pumpcontrol system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-123450